Production of coherent bodies from comminuted substances.



UNITED STATES PATENT OFFICE.

WILHELMSOHUMAOHER, or OSNABRUGK, GER-MANY, ASSIGNOR T ERNST 'THALMANN, or NEW YORK, N. Y.

' iaooucnou '05 COHERIENT BODIES om 'COMMINUTED SUBSTANCESI Specification of Letters Patent.

Patented. May 28, 1907.

Original application filed September 16, 1904, Serial No. 224,717; Divided and this application filed February 20, 1907.

' Serial No. 358.491-

To all whom it may concern.

Be it known that I,W1LHELM SCHUMAOHER, a subject of the Emperor of Germany, and a resident of Osnabruck, Prussia, Germany, haveinvented certain new anduseful Imrovements in the. Production of Coherent odiesfrom Comininuted Substances, oiv

which the followin is a specification.

My inventionre ates'to the production of coherent bodies from ulveri-zed ores, blast furnace dust, and the such substances into more convenient form 1 for shipping and treatment.

My-present invention relates particularly to an efficient way of binding the comminuted substances together with the aid of calclumsilicate, whether'u'sed alone or with, the addition of lime, and involvestreatmen't of the comminuted substances together with the binder. by means of steam under pressure.

. The present ap lication is a division of one filed by me in the nited States Patent Ofiice on Se 'tember 16th 1904, Serial No. 224,717.

I"o taincalcium silicate any suitable manner, for instance by burning or meltin together its components (silica or quartz an lime) or by precipitatingjit from a solution, as by means of calcium chlorid from] water; glass (silicate of soda), This calcium silicats I grind very finely, and mix it with the comminuted substance such as fine ores or blast furnace dust, taking care to have a proper amount of moisture; The proport1on of calcium silicate should be as low as 4 possible, and in most cases'the calcium silisome lime (hydrate of lime) this being the I preferred procedure. It is desirable to have ing power ofthe calcium silicate.

ke, thereby bringing;

" the raw materials, such as quartz and lime,

fromWhi'ch-the calcium silicate is prepared,

as pure as possible as this increases the bind- The calcium silicate with or without the addition of lime having been thoroughly mixed with the oreor other .comminuted substance, the

mass, after having been formed into suitable.-

lumps or briquets, is brought into a closed vessel in which it is subjected to the action of steam under pressure. This converts. the calcium silicate into an eflicient binder (collodial calcium silicate), and after removal. from the vessel the lumps or briquets are found to be suflicien'tly hard and resistant to stand the strain to which they may be sub 'jected during shipment and treatment, say

in a furnace, without premature crumbling, I claim as my invention:

1. The herein described process for the production of coherent bodies from line ores, last furnace dust andthe' like, which consists in subjectingv a mixture of finely divided calcium silicate .With the substance to (lerpressure. 2. The herein described processfor' the production of coherent bodies from fine ores, last furnace dust and the likegwhichfconsists in subjecting a mixture of finely divided calcium silicate and lime with the substance to be agglomerated, to the action of,

steam under pressure.

In testimony whereof I haVe'hereuntG subscribed my name in the presence of two subscribing witnesses.

. WILHEL -"SCHUMACHERQ Witnesses:

PAUL R. Tnonrsou, JAMES M. BQWCOCK.

5 be agglomerated, tothe action of steam un- 

